Arkansas Lake
Prowers County, ColoradoView mapDirections
Not enough samples to grade — no nutrient or algae measurement meets the evidence bar (at least 3 samples within 10 years). No letter yet. Here is what we do have.
- Limited data
Arkansas Lake in Prowers County, Colorado is not rated for water quality — its monitoring record does not meet the evidence bar.
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Watch Arkansas Lake’s letter
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Why Arkansas Lake has no grade
We grade a lake only when the monitoring record supports a letter: at least three phosphorus or chlorophyll-a samples in the last ten years, scored against EPA National Lakes Assessment thresholds for this lake’s ecoregion. For Arkansas Lake, no nutrient or algae measurement meets the evidence bar (at least 3 samples within 10 years).
Not Rated is not an F. It is EPA Integrated Reporting Category 3 — insufficient information. The water here may be excellent or poor; nobody has measured enough of it to say. Everything below that has been measured is still reported on this page.
Sampling is run by CDPHE and volunteer programs, and published through the EPA Water Quality Portal. Read the full grading methodology.
Arkansas Lake is a lake in Prowers County, Colorado.
Source: EPA Water Quality Portal sampling records, CDPHE, last sampled 2024-05-20. Grade methodology: LakeQuality methodology.
Swimming Safety
Not ratedLimited data
The letter is not a swimming clearance. Check local advisories before you swim.
Water quality measurements for Arkansas Lake
These readings exist but are not enough for an A–F grade — see why.
No clarity data.
| Metric | Value | Grade |
|---|---|---|
| Water Clarity (Secchi Depth) | No recent samples | |
| Phosphorus | No recent samples | |
| Chlorophyll-a (Algae) | No recent samples |
Fishing Arkansas Lake
Nearby Lakes in Prowers County
Frequently asked questions about Arkansas Lake
Where is Arkansas Lake?
- Arkansas Lake is a lake in Prowers County, Colorado. LakeQuality has not rated this lake (UNRATED) — no nutrient or algae measurement meets the evidence bar (at least 3 samples within 10 years).
What is the water quality grade for Arkansas Lake?
- Arkansas Lake in Prowers County, Colorado is not rated for water quality — its monitoring record does not meet the evidence bar.
Is Arkansas Lake safe to swim in?
- The letter is not a swimming clearance. Check local advisories before you swim.
Explore Arkansas Lake across LakeQuality
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Where this data comes from
2 measurements from 2 monitoring stations, 2024. Retrieved from the EPA Water Quality Portal on 2026-08-02.
Collected and reported by
- Colorado River Watch (Volunteer)
CORIVWCH_WQX2 samples · 2024
Analytical methods
- Phosphorus by Colorimetry
Monitoring station identifiers (2)
Grade thresholds from the EPA National Lakes Assessment (EPA 841-R-24-006, Table 6-3), applied by ecoregion. See how grades are calculated and data sources.